KOKUSAI DENSHIN DENWA CO., LTD.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01S DEVICES USING STIMULATED EMISSION488
 
  
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 3202
 
  
 
H04N PICTORIAL COMMUNICATION, e.g. TELEVISION 3239
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 2445
 
  
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 2283
 
  
 
C03B MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL 146
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158
 
  
 
G06K RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS 1197
 
  
 
H04M TELEPHONIC COMMUNICATION 1162

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5978353 Multiplex terminal station apparatusAug 23, 96Nov 02, 99[G01R]
5832462 Electronic dealing system for performing automatic matching between order side and hit side customersMar 01, 94Nov 03, 98[G06F]
5726767 Automatic facsimile signal analyzing apparatus for a telephone exchange systemJun 30, 95Mar 10, 98[H04M, H04N]
5710660 Gain-controllable optical amplifier and optical gain-control methodFeb 26, 96Jan 20, 98[C02B, H01S]
5655088 Electronic market transaction system for detecting orders reaching a prescribed frequency of failure to increase chance of establishing transactionsMar 01, 94Aug 05, 97[G06F]
5510930 Light amplifying apparatusJul 18, 94Apr 23, 96[H01S]
5394395 Cell delay addition circuitJul 02, 93Feb 28, 95[H04L]
5386436 Synchronization system for use in digital transmission systemMay 07, 92Jan 31, 95[H04L]
5367587 Optical amplifierFeb 09, 94Nov 22, 94[G02B, H01S]
5309231 Adaptive encoding system of moving picture frameJun 11, 92May 03, 94[H04N]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6975624 Network interworking device for LAN/internetExpiredOct 13, 98Dec 13, 05[H04L, H04J]
6856650 Method and apparatus for second or later generation coding of video signalExpiredJul 11, 97Feb 15, 05[H04B]
2003/0078,898 CHARGING SYSTEM, APPARATUS FOR DECIDING A UNIT CHARGE, APPARATUS FOR DISPLAYING A UNIT CHARGE, CIRCUIT CONTROL APPARATUS AND ACCESS CONTROL APPARATUSAbandonedOct 16, 98Apr 24, 03[G06F, G06G]
6493390 Motion compensation image encoding deviceExpiredSep 28, 98Dec 10, 02[H04B]
6445478 Optical pulse position detecting circuit and an optical pulse generating apparatus and their methodsExpiredJan 19, 01Sep 03, 02[H04B]
2002/0067,522 OPTICAL TRANSMISSION LINE MONITORING APPARATUS AND RECEIVING STATIONAbandonedJun 09, 98Jun 06, 02[H04B, H04J]
6327060 Optical transmission system, optically branching apparatus and optical signal processing apparatusExpiredMar 04, 98Dec 04, 01[H04B, H04J]
6317534 Optical wavelength routing deviceExpiredDec 18, 98Nov 13, 01[G02B]
6292603 Dispersion compensation deviceExpiredDec 08, 98Sep 18, 01[G02B]
2001/0012,144 MULTI-WAVELENGTH LIGHT SOURCE AND DISCRETE-WAVELENGTH-VARIABLE LIGHT SOURCEAbandonedSep 17, 97Aug 09, 01[H04B]
6236488 Optical pulse position detecting circuit and an optical pulse generating apparatus and their methodsExpiredMar 31, 98May 22, 01[H04B]
6115156 Demultiplexer device for wavelength-division multiplexed optical fiber communicationExpiredNov 05, 97Sep 05, 00[H04J]
6061352 ATM cell receiver system with source clock recoveryExpiredDec 03, 96May 09, 00[H04L, H04J]
6052734 Method and apparatus for dynamic data rate control over a packet-switched networkExpiredFeb 17, 98Apr 18, 00[G06F]
6037612 Semiconductor light emitting device having nanostructure porous silicon and mesostructure porous siliconExpiredSep 09, 98Mar 14, 00[H01L]
6028695 Optical modulating apparatusExpiredJul 30, 98Feb 22, 00[G02F]
5987419 Automatic securities exchange system which detects communications errors and allows cancellation of ordersExpiredMar 18, 94Nov 16, 99[G06F]
5920413 Method and device for optical add/drop multiplexing using high speed polarization scramblerExpiredApr 04, 97Jul 06, 99[H04J]
5898502 Optical wavelength monitoring apparatusExpiredJun 19, 97Apr 27, 99[G01J, H04B]
5898719 Optical frequency stabilizerExpiredAug 08, 97Apr 27, 99[G02B, H01S, H04J]

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